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Paper Abstract and Keywords
Presentation 2014-01-23 14:55
A Second Trip Echo Suppression Method Using Two Kinds of Code Sequence for Radars
Marie Kato, Hiroshi Sakamaki, Kazufumi Hirata (Mitsubishi Electric) SANE2013-117
Abstract (in Japanese) (See Japanese page) 
(in English) In pulse radars, if there is strong scatterer beyond the unambiguous range of the radars, there are cases when a second-trip echo contaminates desired signals. To suppress the second-trip echo, phase coding of the transmitted signal is commonly employed. Conventionally we use an approach that is to let the second-trip echo become white noise in a frequency domain by using random phase coding for each pulse. This approach is commonly used to suppress second-trip echo. However, the problem with this method has is the estimated precision of first-trip echo deteriorates when the second-trip echo is strong. In this paper, we propose a new second-trip echo suppression method. In the proposed method, second-trip echo is subtracted from received signal using two kinds of code sequences. As a result, first-trip echo can be estimated with high accuracy without depending on the power ratio. We have confirmed the effectiveness of the proposed method through simulations. For example, while the standard error of estimated velocity of the first-trip echo using the previous method exceeds 10 m/s, in the proposed method it is only 0.02 m/s.
Keyword (in Japanese) (See Japanese page) 
(in English) radar / second-trip echo / code sequence / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 387, SANE2013-117, pp. 25-30, Jan. 2014.
Paper # SANE2013-117 
Date of Issue 2014-01-16 (SANE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SANE  
Conference Date 2014-01-23 - 2014-01-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagasaki Prefectural Art Museum 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Positioning, navigation and general 
Paper Information
Registration To SANE 
Conference Code 2014-01-SANE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Second Trip Echo Suppression Method Using Two Kinds of Code Sequence for Radars 
Sub Title (in English)  
Keyword(1) radar  
Keyword(2) second-trip echo  
Keyword(3) code sequence  
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1st Author's Name Marie Kato  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
2nd Author's Name Hiroshi Sakamaki  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
3rd Author's Name Kazufumi Hirata  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
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Speaker Author-1 
Date Time 2014-01-23 14:55:00 
Presentation Time 25 minutes 
Registration for SANE 
Paper # SANE2013-117 
Volume (vol) vol.113 
Number (no) no.387 
Page pp.25-30 
#Pages 6 
Date of Issue 2014-01-16 (SANE) 

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